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Possible definitions for uboat
Abbate
Italian painter. He was trained in Modena and developed his mature style under the influence of his contemporaries Correggio and Parmigianino in Bologna (1544-52). There he painted portraits and decorated palaces with frescoes of landscapes and figure compositions in the Mannerist style. In 1552 he was invited by Henry II of France to work under Primaticcio at the Palace of Fontainebleau, where he executed immense murals (most now lost). He remained in France the rest of his life. His mythological landscapes were a principal source of the French classical landscape tradition, and he was a precursor of Claude Lorrain and N. Poussin.
bat
Any member of about 900 species (order Chiroptera) of the only mammals to have evolved true flight. Their wings are evolutionary modification of the forelimbs, with greatly elongated fingers joined by a membrane that extends down the side of the body. Most bats use echolocation to orient themselves and find prey. Found worldwide, they are particularly abundant in the tropics. Wingspreads vary among species from 6 in. (15 cm) to 5 ft (1.5 m). Nearly all species roost during the day (in caves, crevices, burrows, building, or trees) and feed at night. Most are insectivores, consuming enough insects to affect the balance of insect populations. Others feed on fruit, pollen, nectar, or blood (vampire bats). Some may live more than 20 years. The guano of bats has long been used for agricultural fertilizer. See also free-tailed bat, fruit bat.
beat
In physics, the pulsation resulting from a combination of two waves of slightly different frequency. Beat frequency is the difference between the frequencies of the combining waves. When the interfering frequencies are in the audible range, the beats are heard as alternating soft and loud pulses. The human ear can detect beats with frequencies up to 10 hertz, or 10 beats per second. Piano tuners listen for beats when comparing the pitch of a tuning fork to that of a vibrating string; when no beats are heard, the fork and string are at the same frequency. Ultrasonic or inaudible frequencies can be superimposed to produce audible beats, allowing the detection of vocal sounds produced by bats or dolphins.
boa
Any of about 60 species of stout-bodied snakes (subfamily Boinae, family Boidae) found in both the Old and New Worlds, mostly in warm regions. Species vary in length from about 8 in. (20 cm) to more than 25 ft (7.5 m). Most are terrestrial or semiaquatic; some live in trees. Most species have blotches and diamonds on their brown, green, or yellowish body. Boas bite their prey, then kill by wrapping their body around the prey and crushing it. Several species have heat-sensitive lip pits for detecting warm-blooded prey, and most bear live young. Contrary to folklore, boas are not dangerous to humans.
boar
Any wild member of the pig species Sus scrofa; the ancestor of domestic ...
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